Problems With Painting Siding

Anyone with older aluminum siding is well aware of the paint chalking problem. Just rub your hand along the old siding and the chalky old paint will be all over your palm. Trying to get paint to stick to this could be a real problem. This is due to oxidation of the paint. Siding manufacturers originally referred to this problem as a “benefit”. They called it, “self cleaning”, as the paint literally washed off the house.

Older vinyl siding is also a problem. UV light fades vinyl siding over time and the siding becomes very unsightly.

Many unfortunate homeowners and Toronto paint contractors have experienced the dismay, when they repainted their homes, only to find the new paint peeling off a few months later. Both problems with older aluminum and vinyl siding can be overcome with proper cleaning, surface preparation and re-painting.

Cleaning

You will need to rent a powerful pressure washer with at least 3000 psi. You will want a pressure washer powerful enough to remove most of the old chalky paint off the aluminum siding or, to remove any dirt buildup on the old vinyl siding.

Start at the top course of siding and work your way down. You will need to keep the pressure wand fairly close to the siding surface to effectively remove the old paint. In some areas, you may find that the paint comes off to the bare metal. Be careful near windows, corners, soffits and doorways. The water under pressure, can be forced behind these areas causing damage. You can add TSP or other cleaning solutions to the reservoir for mildew, algae or other grime built up. If you do use a cleaning solution, be sure to completely rinse it off with your pressure washer. You should allow your home to dry for several days in dry, sunny weather before proceeding to the painting process.

If you are repainting vinyl siding or vinyl coated aluminum siding, you may need a surface de-glosser. This is a solvent type product used to remove any shine on the surface and to help your first coat to adhere better. You will have no trouble finding a good de-glosser at your local paint supply store.